Erasing-tool.



L. KAISER.

ERASING TOOL.

APPLICATION FILED MAY 23. 1912.

1,151.36. Patented Aug. 24, 1915.

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@FEKQE.

ERASING-TOOL.

Specification of Iietters Patent.

I, Patented Au 24, 1915.

Application filed May 23, 1912. Serial No. 699,322.

To all whom it may concern Be it known that I, LEONHARD KAIsnn, a subject of the Duke of Sachsen-Meiningen, German Empire, residing at Lauscha, 1n the German Empire, have invented certain new and useful Improvements in Erasing- Tools, of which the following is a specification.

The object of my invention is to provide an easing tool having a glass-brush which can easily be detached from and connected with a movable interior sleeve in such a manner that the glassbrush can be moved forward or drawn back with the interior sleeve when not required for use.

In the accompanying drawing, Figure 1 is a vertical longitudinal section through the erasing tool, showing it in position for use, Fig. 2 is a central longitudinal section through the erasing tool, showing the parts inserted and fully inclosed, Fig. 3 shows a detail side-view of the glass-brush as de tached, Fig. at is a side-elevation, and Fig. 5 a front-elevation of the brush connecting piece, Fig. 6 is a vertical longitudinal section showing the connection of the head of the glass-brush with the cup-shaped end of the interior sleeve, and Fig. 7 is a glasstube for a reserve glass-brush.

Similar letters of reference indicate corresponding parts throughout the different figures of the drawing.

The improved erasing tool consists of two screw-threaded sheet-metal sleeves a and b, the interior sleeve Z) being formed at its one end with a slitted cup-shaped end 0, the spherical knob d of which forms part of the head 7 of the glass-brush g. The opposite end of the interior tube 6 is adapted to receive an ordinary dust-brush 72 or the like. A conical sleeve 71 is screwed over the end of the outer sleeve c.

Having described the construction of the erasing tool, the operation of the same will be described. In order to make use of the erasing tool, the outer sleeve is held in one hand and the interior sleeve Z) turned until the glass-brush projects more or less out of the conical sleeve 2'. To remove dust which is caused by erasing, the dust-brush 72, is placed in outward position, shown in Fig. 1. After use the sleeve 5 is turned in the opposite direction and the glass-brush drawn back into the conical sleeve 5 and outer sleeve a (Fig. 2),

In order to substitute a new brush for into the cup-shaped end 0, the parts of which give sufliciently and then hold the glass-brush back of the knob. The brush can now be moved backward and forward with the sleeve Z). When being drawn into the sleeve a, the conical sleeve 2' is placed again in position thereon and the new brush is ready for use. Reserve brushes are preferably held inclosed in glass-tubes (Fig. 7), as the front-face of the glass-brush would become black in metal tubes. The new tool can also be used for cleaning and polishing metals and the like.

A considerable advantage consists in the possibility of introducing the glass brush from the front instead of from the rear end as heretofore, also in its detachability and in its adjustment in forward and backward direction in the sleeve a.

I claim:

1. In combination, an outer sleeve and an inner sleeve-said sleeves having intermediate and coacting screw-threading, where by the said sleeves are movable in opposite directions relatively to each other, of a glass brush movable in the outer sleeve, and means for yieldingly and detachably swivelly connecting the head of the glass brush with the interior sleeve.

2. In combination, an outer sleeve, an innersleeve, said sleeves having intermediate and coacting screw-threading, whereby the said sleeves are movable in opposite directions relatively to each other, of a glass brush movable in the outer sleeve, the head of said glass brush being detachably and swivelly fastened to the adjacent end of said inner sleeve, said end of said inner sleeve being capable of being protruded from said outer sleeve.

3. In combination, an outer sleeve, an inner sleeve having a cup-shaped slitted end, said sleeves having intermediate and coacting screw-threading, whereby the said sleeves are movable in opposite directions relatively to each other, of a glass brush movable in the outer sleeve, said glass brush having a spherical knob on the brushhead adapted it be inserted into thecupany invention, I have. signed my name in shaped slitted end of the inner sleeve to be presence of two subscribing'witnesses.

swivelly held thereby, said cup-shaped slit- LEONHARD KAISER. ted end being capable of being protruded Witnesses: v 5 from the outer sleeve. d I I EUGEN' MAIER,

In testimcny, that I claim the foregoing as OSCAR BOGK.

Copies of thisipatent may be obtained for five "cents each, by addressing the Commissioner of Patents, Washington, 13.0.. 

